NOT UNTIL/ HE / GET/ OFFICE/PAUL /REALISE/HE/LEAVE/BRIEFCASE/HOMEA....

46.not until/ he / get/ office/Paul /realise/he/leave/briefcase/homeA.Not until he got to the office did Paul realise he had left his briefcase at homeB.Not until did he get to the office Paul realised he had left his briefcase at home.C.Not until he got to the office Paul realised he had left his briefcase at home.D.Not until he got to the office did Paul realise he has left his briefcase at home.